Changes between Version 48 and Version 49 of FAQ


Ignore:
Timestamp:
06/22/2014 12:45:56 PM (5 years ago)
Author:
Gabriele Pohl
Comment:

link to badblockhowto in subversion repo

Legend:

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  • FAQ

    v48 v49  
    347347
    348348If the disk can read the sector of data a single time, and the damage is permanent, not transient, then the disk firmware will mark the sector as 'bad' and allocate a spare sector to replace it.  But if the disk can't read the sector even once, then it won't reallocate the sector, in hopes of being able, at some time in the future, to read the data from it.  '''A write to an unreadable (corrupted) sector will fix the problem.''' If the damage is transient, then new consistent data will be written to the sector.
    349 If the damange is permanent, then the write will force sector reallocation. Please see [http://smartmontools.sourceforge.net/badblockhowto.html Bad block HOWTO] for instructions about how to force this sector to reallocate (Linux only).
     349If the damange is permanent, then the write will force sector reallocation. Please see [//browser/trunk/www/badblockhowto.xml Bad block HOWTO] for instructions about how to force this sector to reallocate (Linux only).
    350350
    351351The disk still has passing health status because the firmware has not found other signs of trouble, such as a failing servo.
    352352
    353 Such disks can often be repaired by using the disk manufaturer's 'disk evaluation and repair' utility.  Beware: this may force reallocation of the lost sector and thus corrupt or destroy any file system on the disk. See [http://smartmontools.sourceforge.net/badblockhowto.html Bad block HOWTO] for generic Linux instructions.
     353Such disks can often be repaired by using the disk manufaturer's 'disk evaluation and repair' utility.  Beware: this may force reallocation of the lost sector and thus corrupt or destroy any file system on the disk. See [//browser/trunk/www/badblockhowto.xml Bad block HOWTO] for generic Linux instructions.
    354354
    355355----
     
    363363If your disk has an unreadable sector, this means that some of your data can't be retrieved.  You can force the disk to replace the unreadable sector with a spare good sector, but only at the price of losing the 512 bytes of data forever.
    364364
    365 Disks with uncorrectable sectors can often be repaired by using the disk manufaturer's 'disk evaluation and repair' utility (see previous FAQ entry).  Beware: this may force reallocation of the lost sector and thus corrupt or destroy any file system on the disk. See [http://smartmontools.sourceforge.net/badblockhowto.html Bad block HOWTO] for generic Linux instructions.
     365Disks with uncorrectable sectors can often be repaired by using the disk manufaturer's 'disk evaluation and repair' utility (see previous FAQ entry).  Beware: this may force reallocation of the lost sector and thus corrupt or destroy any file system on the disk. See [//browser/trunk/www/badblockhowto.xml Bad block HOWTO] for generic Linux instructions.
    366366
    367367Normally when an uncorrectable sector is found, the disk puts this onto a 'pending sector list' to indicate that it should be replaced with a spare good sector.  However this replacement won't take place until either the disk can read the data on the bad sector, or is instructed to write new data to that bad sector.